2105974657 has 2 divisors, whose sum is σ = 2105974658. Its totient is φ = 2105974656.

The previous prime is 2105974631. The next prime is 2105974669. The reversal of 2105974657 is 7564795012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1077874561 + 1028100096 = 32831^2 + 32064^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105974657 - 2⁷ = 2105974529 is a prime.

It is not a weakly prime, because it can be changed into another prime (2105974627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052987328 + 1052987329.

It is an arithmetic number, because the mean of its divisors is an integer number (1052987329).

Almost surely, 2^2105974657 is an apocalyptic number.

It is an amenable number.

2105974657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105974657 is an equidigital number, since it uses as much as digits as its factorization.

2105974657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 2105974657 is about 45890.8995008814. The cubic root of 2105974657 is about 1281.7924628938.

The spelling of 2105974657 in words is "two billion, one hundred five million, nine hundred seventy-four thousand, six hundred fifty-seven".